Pagination problems on treasury page

[martonp]

I did notice that the pagination seems to have a few bugs though. For example, if you refresh the page with a transaction type selected (spend in this case), it'll show the correct number of transactions (e.g. showing 1 -- 4 of 4 transactions), but if you select All from the type dropdown and then go back to Spend, it doesn't update properly (e.g. showing 1 – 20 of 123,607 transactions).

I also noticed the next link is not disabled when when there are no more results as would be expected.

For example, if you start at https://explorer.dcrdata.org/treasury?txntype=tspend, the next link is active and if you click it, the pagination changes to showing 21 – 40 of 123,608 transactions although there are not any actual results displayed.

Originally posted by @davecgh in #1924 (comment)

[martonp]

I'll fix this.